One major update with ArcGIS 10 SP1 is 64-Bit Background Geoprocessing, available as a separate download here. There are major implications for any organization that process big-data:
This 64-bit installation (which requires a 64-bit operating system)
will replace your current background processing. All scripts, models
and tools which execute in the background will use a 64-bit process.
Your biggest benefit when using 64-bit Background processing is that
using 64-bit applications allow your large processes to take advantage
of more memory (if available) than when using a 32-bit application.
I think you will find a lot of interest in this new feature and it would be easy to incorporate this into a presentation. I've personally had great success using 64-bit background geoprocessing on memory expansive operations such as Integrate, where 32-bit processing had previously failed.